As shown in this artist's rendering, not all mammals were afraid of the dinosaurs. In 2005, Chinese scientists reported the discovery a 130 million-year-old, opossum-sized mammal with the remains of a young dinosaur in its belly. Nearby, the scientists found a 3-foot long mammal that probably weighed more than 30 pounds, putting it in a class of its own as a formidable dinosaur predator. Why these early mammals went extinct remains a mystery.
Mystery solved. Dinosaurs as the meal also disappeared.
| 
